"Where can I find a good restorer...?"  

Useful article
but before I would ship an item cross country, here's what I would do:
In your town, go to the better mid-centiry modern stores and ask who they use to restore their stuff.
I'm in Minneapolis and when I bought my first item from a 'retro' shop (in St. Paul), I asked who's doing good restoration and reupholstery and I was given the name of "Remnants" in Minneapolis, run by David Osterberg. He understands the period and does great work.
Thus far, he's done 4 items for me:
1. Repaired and recovered a Saarinen Grasshopper chhair and ottoman
2. Refoamed and recovered a Saarinen stool
3. Recovered a cool round seat 1930's Chrome chair
4. Completely redid an Eames LaFonda chair shell (removing the hardened old foam, replaced the foam and recoovered it with Ray Eames Crosspatch Spring fabric).
He has done excellent quality work, and I'm sure that most bigger cities have a business that does equal quality work.
So, check with friends who collect the same kind of stuff and check with the shops and you'll get name.
Finally, LRF, who posts here alot has an upholstery busines in Tulsa.

redid the foam in Minneapolis
Good to know, and thanks for reminder about our friend LRF.

yes thanks for remembering ...
yes thanks for remembering me
We appreciate all business, We have chairs coming from The East coast and the West coast,
Sometimes, all right all the time , i wonder why people
from NYC and LA ship us so many large chairs, Womb chair,Egg chair, as i guess they can not find anyone in their area that recovers modern furniture,
It can be very difficult to do, some of these pieces, as they were all constructed with foam, that was sprayed on and the hardest thing is to remove all that miel.
So the smart thing to do is like Barry says always
see if there is a great upholstry shop in your home town first for your larger chairs, and contact us
if you can not find one.